of chicago



Patented Nov. 11, 1930 UNITED STATES i T FI 'E CLARENCE G. CARL-SON, orCHICAGO, ILLINOIS, AssIGNon T ornoAGo CURTAIN s'rnn'rcnnn COMPANY,OFVCHIGAGO, ILLINOIS, A CORPORATION ornmmors,

CURTAIN srnn'ror-rnn Application filed December 17 -1928. Serial-No.326,551.

This invention relates to curtain stretchers and particularly to foldingstretchers wherein two sections of a side or end member are hingedtogether so that they may be folded for convenient disposition when thestretcher is not in use.

The invention comprises certain improvements on the stretcher covered byLetters Patent No. 991,781 patented May 9, 1911.

The object of the invention is to lock the hinge and the sections of themember together rigidly and securely for maintaining the stretchersections in aligned position and prevent the member from yielding orbreaking joint at the hinge.

A further object of the invention is to provide a novel locking devicefor cooperation with the hinge at the joint between the abutting ends ofthe sections for securing the hinge and the sections rigidly together inopen position.

In the accompanying drawings illustrating a selected embodiment of theinvention Fig. l is a top plan view of the hinged ends of two sidemember sections of the stretcher in open position;

Fig. 2 is a bottom plan view of the part shown in Fig. 1;

Fig. 3 is a view similar to Fig. 1 but showing the hinged joint partlyopen; and

Fig. 4 is a sectional view on the line 4-4 of Fig. 1.

Referring to the drawings 5 represents one of the side members of acurtain stretcher frame and comprising the sections 6 and 7 which areconnected together by a hinged joint. The hinge comprises the two hingeplates 8 and 9 which are pivoted together at 10 and are applied to thebottom ofthe top of the section 7 and this plate and the v hinge plate 9are secured to the section by the rivet 16. The plate 15isbent at and at18 to provide a crowned yielding locking portion having a downwardprojecting shoulder 19'and anuptu'rnedend 20. The plate V 13 has anup-bent shoulder 21 and a downwardly extending end 22; The shoulder 19is arranged to ride over the shoulder 21 when the hinge is closed 7 andthe sections are aligned, Fig. 1, and thenthe shouldered end portion ofthe plate13 lies under the crowned portion between the shoulders 17,18of the plate 15, and the shouldered end portion 19 of the plate 15 liesabove the plate 1 3 behind the shoulder 21. A bolt 23 passes through theplate 15, between the abuttingends of'the sections throughaslot'Sin theplate 8 and through an opening in the plate 9, and carries a wing nut24. The end of the section 7 is provided with a groove 7"to'accommodatethe bolt 23 and the end of the section; 6 also has a groove 6 whichregisters with the 'groove 8 -i n the p1ate -8 and with a groove 13' inthefreeend of the plate'13' to accom modate the bolt which iscentered,when the hingeis closed, in the joint between the ends of thesections; f 3 i In practice'the'stretcher is usually-folded for storageand the wijng nut is loosenedon the bolt. In closing thehingetheshoulder 19 rides over the-shoulder 21 to' the position shown in Fig. 4with the 'sections6 7 aligned and their ends abutting. "Then thewing nutis tightened and the overlapping portions of the hinge plates areclamped together and upon the joint of the sections and the[yieldingshouldered end portion of the plate 15 is clamped tightly upon'the'shouldered'end portion of the plate 13=thereby locking the partstogether with'the sections rigid in alignment.- The shoulders ontheplates 13, 15 provide an interlocking engagement which ismaintained-by thebolt and nut 231j24 which also clamp the springplates'togeth'er; and upon the sections whereby a rigid joint isobtained" and maintained throughout the i use of the-stretcher. 1The-crowned portion of-theplate 15 is yielding-so that the-shouli der 19will ride over the shoulder 21 in closing and in opening the hinge. Theinvention 7 provides a novel and simple means for join- Nov. 11, 1930.v. CARROLL 1,780,996

7 COFFEE URN Filed Jan. 11, 1926 Patented Nov. 11 1930 d'lvincnizr 1).cannon, or' oiironeqf rtinors g p I corrnnumvf f" My invention relatesto coffee urns.

It relates more particularly to temperature. controlling devices for thetypes of coffee urns commonly used in lunchrooms,restaurants,

[5 etc.

In the use of coffee urns prior tomy-invem tion, the supply ofgas orother fiuid fu'elto the burner has been manually regulated; ":Due

to the carelessnessor"forgetfulness ofthose 10 having charge ofmakingthecoffeeythe coffee frequently was notheatedto the propertemperature or the burner was at times unneces;

sarily left burning at full pressure, resulting in a waste of gas andoccasionallyin the burn ing out of the bottom of the urn.

It isaniobj ect of my invention to provide ,a simple andefiecti'vefmeans for automatically controlling the temperature ofthecoffee.

1 A further obj ect is to provide means by which a coflee urn may bereadily adapted to be equipped with my regulating device.

. A further object is toprovide a fuel saving device for coffee-urns. Iv i A further object is to provide; a simple safety device forpreventing eXcessi-vedifferences of pressure between the atmosphere andthe inside of the water container of the urn and for indicating whenthe, waterzlevel' in the containerisilow. a a c v Other objects willappear from the following' specification, and reference being; made tothe accompanying drawings, in which;

Figure 1 is an elevation of a water "heater and a coffee urn,'the'latter being shown 'partly in section. 1 Figure 2 is a sectionof'the regulator taken on line 2-2 of Fig.1. v .1 s

Figure 3 is a'section of the by-pass valve taken on line 33 of Fig. 1.

Figure 4 isan enlarged plain view tion'ofthe sealingring. 1 p

i-Figure5 is an enlarged sectional 'view thereof, taken on the line 5'--5 of Fig.4. Y A water heater 6; shown in outline form in Figure 1, isordinarily used to supply-hot 'wa f a'porter to one or'more coffeeurns'f; being connected thereto by .a pipe 8 in whichfthe flow isregulated by a valve 9. The cofiee urn-com; prises a container 10mounted on legs-11, and having a removablejcover 12." A' coifee jar 13,

in the container by means of the draught pipe 14 which passes throughthe side of the container, and its outer endis equipped with. a l Ifaucetl5,j The coffee bag 16 is suitably supported injthe top ofithe1coffee jar13..1 A flanged ring 17 resting upon the top edge of thecoffee jarv craus'es'the supply water-from the pipe 8 and the.condensation from thetop ofthe container to drain into the jar. :The'

1 usually ma deofnvitrified chinai-is supported 7 space between the jarand the container is 1 partly filled with-water which is heatedby aburner 18, which is represented as a gas bur-n5 er suppliedwith gasbythe pipe 19. Y 1 I Thesupply of'gas'to'th'sburner, as will behereinafter,described, is. regulated by pressure generated in the space1 surrounding the cofiee ar It; is therefore necessary to sealthis'space from the atmosphere. I accomplish this by meansof;a;n-annular rubber tube 20 which fits between-the outer surface ofthe jar13at its upper edge, and the in-v ner surface of the container.After the tube is inplace it is compressed'to fo-rma tighter seal bytighteningfithe closelyspaced screws 21 which pass freely through thesemi-cylim drical Washers 22, diametrically through the tube 2O,'and arethreadedthenuts 23 which are similar-to the washers in shape. TheWashers 2 2 have pin-like projections 22? which are formed by anincomplete punching op eration. The washers 22 are connected by links 24which have elongated slots 2 P -fitting; over the projections 22. Thewprovision ;of these slots permits 7 the tube to; be cut to a standardlengthandtO bestr'etched to fit. slightly varying sized containers. Itwill be obvious thatiby tightening the screws 21, the tube willbelaterally deformedjto form a seal between thejar and the container whichwill be sufiiciently tightto hold the small pressures which I use in myregulating device. A; small tube 25 eXtends-intofthe water in theContainer some distance below the'normal water line The tube is'h eldand sealed in place in theusual filling pocket-13f? by a packing 26,preferablygofilea'dwool A soaked/in; v red lead, or some other suitableb i g te a -w. It ha beenlfo nd-th t his m o "pa k-ins s: ry s ti faoryi's me roe I

